Tension device for warp-beams.



G. KELLER. TENSION DEVICE FOR WARP BEAMS. APPLICATION FILED JAN. 29. 1913. RENEWED AUG. 3,1915.

Lllfifififi' I Patented Apr. 18, 1916.

L Jxelfilllall, WITNESSES 5 K La Goilflzieb e a);

K o F 8V but GOTTLIEB KELLER, OF NEW YORK, N. Y.

TENSI ON DEVICE FOR- WARP-BEAMS.

Specification of Letters Patent.

Patented Apr. 18, 1916.

Application filed January 29, 1913, Serial No. 744,858. Renewed August 3, 1915. Serial No. 43,472.

To all whom it may concern:

Be it known that T, Go'rTLmB KELLER, a citizen of the Republic of Switzerland, and a resident of the city of New York, borough of ll lanhattan, in the county and State of New York, have invented a new and 1111- proved Tension Device for l ibirp-Beams, of w rich the following is a full, clear, and exact description.

The object of the present invention is to provide a new and improved tension device for warp beams arranged to permit of conveniently and accurately adjusting the device to any desired degree according to the tension desired on the warp and to enable the operator to quickly throw off the tension bar H against the band so as to securely fasten the doubled-up portions of the band together, thereby providing a loop F which can be adjusted by shifting the clip H of the band.

The bolts K engage transversely-extending on the warp beam whenever it is desired to release the warp for any reason whatever.

in order to accomplish the desired result,-

use is made of a band. winding around the warp beam, an adjustable tension device connected with one end of the said band, and manually-controlled means connected with the said adjustable tension device for throwing the latter oil to release the band and to hold the tension device in the thrown off position.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is an end elevation of a loom showing a warp beam having the tension device attached thereto; Fig. 2 is an enlarged sectional. side elevation of the tension device as applied; Fig. 3 is a similar view of the same and showing the parts in different positions; and Fig. 4 is a sectional plan view of the same on the line l-4 of Fig. 2.

The frame A of the loom is provided with bearings for the shaft B carrying a warp beam C from which unwind warp threads D, and on the ends of the warp beam C are secured pulleys E, around each of which is wound several times a braided band F terminating at one end in a hook F hooked onto a staple G driven into the floor or other support (see Fig. 3). The other end of each band F terminates in a loop F formed by doubling up the end of the band and engaging the doubled-up portion by an adjustable clip H having 2. casing ii, a clamping bar H within the casing,

and a set screw H pressing the clamping slots K formed in the base plate K to allow of adjusting the stand J in a transverse direction to locate the stand in alinement with the pulley E on the warp beam shaft B (see Fig. 1). Thus for longer or shorter warp beams the stands J can be readily adjusted on the base plates K to extend in alinement with the pulleys E.

The lower end 1 of the rod I is provided with screw threads on which screws a nut I against the under side of a plate L mounted to slide up and down on the stand J. The threaded end I of the rod 1 passes looselythrough the plate L and the latter is provided with a pointer L extending through a vertical slot J formed in the stand J the pointer L indicating on the graduation 0 arranged on the face of the stand J. The plate L is provided with friction rollers L in contact with the front and rear of the stand J so as to allow an easy up and down sliding movement of the plate L on the stand J. The end of the plate L is provided with lugs L carrying a pin L to which the loop F of the band F may be attached in case the warp'beam C is located closer to the floor. A spring N is coiled around the rod I and abuts with its upper end against the under side of the top J, and the lower end of the spring N rests on the plate L so that the latter is under tension. The upper end of the rod I is provided with a vertical slot 1 through which extends the transverse pivot pin P of a cam lever P having its cam face P resting on the top J of the stand J. It will be noticed that by screwing the nut I up or down on the threaded end I of the rod I more or less tension can be given to the spring N, the amount of tension being preferably indicated in pounds by the graduation O, as shown in Fig. l.

The operation is as follows: The warp threads D are unwound from the warp beam C in a series of short advances and not continually. The initial friction between the .bands F and the pulleys E is greater than the tension of the spring N and thus at each advance of the warp threads D the bands F turn for a short distance with the pulleys E and the warp beam C until the tension of the spring N becomes greater than the friction whereupon the springs pull down on the loop F 2 of'the band F to return the latter to normal position, of course, always maintaining the warp threads D -under the proper tension and at no time permitting the same to become slack. \Vhen it is de; sired to release the bands F of the tension device then the operator swings the cam levers P from the normal vertical position downward into a horizontal position, as indicated in dotted lines in Fig. 2, whereby the pivot pin P lifts the rod I against the tension of the spring N, and in doing so the tension on the loop F is released to allow the v saver to turn the warp beam C for slacking the warp whenever it is desired to do so for any reason whatever. WVhen it is desired to again place the warp threads D under the proper tension the operator swings the cam levers P upwardly back into vertical position thus allowing the springs N to push the rods I downward so that the loops F of the bands F are placed again under the tension to which the tension device was originally set by the oper- 'ator adjusting the nut I", as before explained.

Each band F is preferably made of braided cords thus providing exceedingly strong and durable bands which can be readily wound around the-pulleys E and provide the desired frictional contact between the bands and the pulleys at the same time reducing the wear of the bands and pulleys to a minimum and insuring long life to the tension device.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. In a loom, the combination with a warp beam, of a band wound around the said warp beam, a stand having a guideway, a springpressed rod mounted to slide on the said stand and having a slotted upper end,'one end of the said band being connected with the said rod, and a cam lever having its pivot engaging the slotted upper end of the said rod and the said guideway, the cam face of the said cam lever having a bearthe said nut, the plate sliding'ly engaging the said stand, a spring coiled on the said rod and abutting with its upper end on the said stand, the lower end of the said spring resting on the said platform, and a cam lever having its pivot engaging the slotted upper end of the said rod and the said guideway, the cam face of the said cam lever having a bearing on the said stand. I

3. In a loom, the combination with a warp beam of a band wound around the said warp beam, a stand having a guideway, a springpressed rod mounted to slide on the said stand and having a slotted upper end, one end of the said band being connected with the said rod, the lower end of the said rod being threaded, a nut screwing on the said lower threaded end, a plate loosely engaging the said rod and resting on the said stand, a spring coiled on the said rod and abutting with its upper end on the said stand, the lower end of the said spring resting on the said platform, a cam lever having its pivot engaging the slotted upper end of the said rod and the said guideway, the cam face of the said cam lever having a bearing on the said stand, a graduation on the said stand, and a pointer on the said plate indicating on the said graduation.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GOTTLIEB KELLER.

Witnesses: I

THEO. G. HOSTER, PHILIP D. ROLLHAUS.

nut, the plate slidingly engaging the said 

